Mercurial > hg
view tests/test-ctxmanager.py @ 33154:4ecc6047d45f
log: add an extension hook-point in changeset_printer
Extensions sometimes wants to add other information in the default log output
format (when no templating is used).
Add an empty function named '_exthook' for easing the extension life.
Extensions will be able to wrap this function and collaborate to display
additional information.
Exthook is called after displaying troubles and just before displaying the
files, extra and description.
Add a new test file to test it and not pollute other test files.
author | Boris Feld <boris.feld@octobus.net> |
---|---|
date | Mon, 26 Jun 2017 15:46:24 +0200 |
parents | 68c43a416585 |
children |
line wrap: on
line source
from __future__ import absolute_import import silenttestrunner import unittest from mercurial import util class contextmanager(object): def __init__(self, name, trace): self.name = name self.entered = False self.exited = False self.trace = trace def __enter__(self): self.entered = True self.trace(('enter', self.name)) return self def __exit__(self, exc_type, exc_val, exc_tb): self.exited = exc_type, exc_val, exc_tb self.trace(('exit', self.name)) def __repr__(self): return '<ctx %r>' % self.name class ctxerror(Exception): pass class raise_on_enter(contextmanager): def __enter__(self): self.trace(('raise', self.name)) raise ctxerror(self.name) class raise_on_exit(contextmanager): def __exit__(self, exc_type, exc_val, exc_tb): self.trace(('raise', self.name)) raise ctxerror(self.name) def ctxmgr(name, trace): return lambda: contextmanager(name, trace) class test_ctxmanager(unittest.TestCase): def test_basics(self): trace = [] addtrace = trace.append with util.ctxmanager(ctxmgr('a', addtrace), ctxmgr('b', addtrace)) as c: a, b = c.enter() c.atexit(addtrace, ('atexit', 'x')) c.atexit(addtrace, ('atexit', 'y')) self.assertEqual(trace, [('enter', 'a'), ('enter', 'b'), ('atexit', 'y'), ('atexit', 'x'), ('exit', 'b'), ('exit', 'a')]) def test_raise_on_enter(self): trace = [] addtrace = trace.append with self.assertRaises(ctxerror): with util.ctxmanager(ctxmgr('a', addtrace), lambda: raise_on_enter('b', addtrace)) as c: c.enter() addtrace('unreachable') self.assertEqual(trace, [('enter', 'a'), ('raise', 'b'), ('exit', 'a')]) def test_raise_on_exit(self): trace = [] addtrace = trace.append with self.assertRaises(ctxerror): with util.ctxmanager(ctxmgr('a', addtrace), lambda: raise_on_exit('b', addtrace)) as c: c.enter() addtrace('running') self.assertEqual(trace, [('enter', 'a'), ('enter', 'b'), 'running', ('raise', 'b'), ('exit', 'a')]) if __name__ == '__main__': silenttestrunner.main(__name__)